1 - Differential geometry : proceedings of the third symposium in pure mathematics of the AMS held at the University of Arizona Tucson, Arizona February 18-19, 1960 |
2 - Topologia combinatoria |
1 - Differential geometry : proceedings of the third symposium in pure mathematics of the AMS held at the University of Arizona Tucson, Arizona February 18-19, 1960 |
2 - Topologia combinatoria |